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Discussion Starter #1
well on my 1990 the oil pressure gage stays at about 75-80 while the car is warming up. then once its warmed up and im driving it it goes from about 60-80. i was also driving it today. did a pretty hard shift from 2nd to third and the car did something weird (no idea what it was) well right then i went and looked down at the gage and the oil pressure was way over the numbers on it. no idea why and it didnt do it again.

but im running 10-30 in it right now.

any idea why its so high?
 

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sending unit might be taking a ****, would wanna hook up a manual gauge to verify pressures though
 

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oil pressure is a common way to measure the RESISTANCE to oil flow rates, thru the engines oil passages and bearing clearances but I will point out that your oil pump has a oil pressure bye-pass circuit that is suppose to limit oil pressure to about 65-70 psi, if its functioning correctly it will limit your max oil pressure


http://forum.grumpysperformance.com/viewtopic.php?f=54&t=52

http://forum.grumpysperformance.com/viewtopic.php?f=54&t=2294

http://forum.grumpysperformance.com/viewtopic.php?f=54&t=3398&st=0&sk=t&sd=a

http://forum.grumpysperformance.com/viewtopic.php?f=54&t=615
 

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Discussion Starter #4
so if the pressure really is getting that high what can i do about it? cause like on one of the links you posted you said you really dont need more than 55 at higher rpms.

so should i first put the new sender unit in it and see what that says?
 

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yes, first verify the pressure actually is getting over 70psi
if it is Id suggest replacing the current oil pump or repairing the current oil pumps by pass circuit, as a first step, if that doesn,t cure the problem youve got more involved issues like a slipped bearing or passage plug

http://forum.grumpysperformance.com/viewtopic.php?f=54&t=3536
 

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if your asking about the sensor location, being next to the distributor base, on the rear of the block, yes thats correct but it could be either a bad sensor, bad connection on the sensor or gauge, or a defective gauge, causing the high pressure reading OR it may be a defective oil pump as previously mentioned

READ THRU THIS LINKED INFO

http://forum.grumpysperformance.com/viewtopic.php?f=54&t=3536

 

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Discussion Starter #9
but that is the sensor that is in my picture right? i just wanna make sure im not wrong and take out the wrong thing.

just wanna take one step at a time. im still relatively new to all this stuff.
 

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another thing to look at is chaffed or broken wires. theres a lot of wiring and metal in that area and our wiring gets really hot under the hood.. I'm discovering most of my ghosts tend to start in that area
 

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I was under the impression that oil pressure cant be higher than the pump can generate...
e.g lets say the pumps maximum psi is 85, the pressure cant be 100?

its possible the sender unit is bad?
 

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most work under a resistance concept. if they show higher it could be a break in the wire. Then they'll show as high as the guage or computer is set to. IE mine goes to solid 80 when it's disconnected
 
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